TMC5072 DATASHEET (Rev. 1.22 / 2017-MAY-16)
13
3.2 5 V Only Supply
22n
+5V
VS
+5V
VCP
100n
100µF
charge pump
reference switch
processing
100n
4.7µ
O1A1
O1A2
VSA
Full Bridge A
Full Bridge B
N
S
5V Voltage
regulator
stepper
motor #1
5VOUT
Controller 1
Driver 1
O1B1
O1B2
VCC
470n
CSN/IO0
SCK/IO1
SDI/IO2
BR1A
BR1B
SPI interface
SDO/RING
NEXTADDR
SWIOP
VS
TMC5072
100n
Single wire
interface
SWION
+VIO
O2A1
O2A2
Full Bridge A
Full Bridge B
N
S
stepper
motor #2
SW_SEL
Controller 2
Driver 2
ENC1A/INT
ENC1B/PP
O2B1
O2B2
INT & position
pulse output
opt. ext. clock
CLK_IN
12-16MHz
BR2A
BR2B
reference switch
processing
+VIO
3.3V or 5V
I/O voltage
VCC_IO
100n
Figure 3.2 5V only operation
While the standard application circuit is limited to roughly 5.5V lower supply voltage, a 5V only
application lets the IC run from a normal 5V +/-5% supply. In this application, linear regulator drop
must be minimized. Therefore, the major 5V load is removed by supplying VCC directly from the
external supply. In order to keep supply ripple away from the analog voltage reference, 5VOUT should
have an own filtering capacity and the 5VOUT pin does not become bridged to the 5V supply.
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